Debugger: use debug break slots instead of ICs (except for calls).

src/codegen.h

Index: src/codegen.h
diff --git a/src/codegen.h b/src/codegen.h
index cce33e4c02e8ab9d03913ce0c82c87627e3425d9..79c2c3369675d87ed5ae4e156bb8e48507bb3175 100644
--- a/src/codegen.h
+++ b/src/codegen.h
@@ -84,10 +84,6 @@ class CodeGenerator {
   // Print the code after compiling it.
   static void PrintCode(Handle<Code> code, CompilationInfo* info);
 
-  static bool RecordPositions(MacroAssembler* masm,
-                              int pos,
-                              bool right_here = false);
-
  private:
   DISALLOW_COPY_AND_ASSIGN(CodeGenerator);
 };